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US 2015/0305805 A1Published application
Hollow body cavity ablation apparatus
AssigneeCardea MedSystems, Inc.
InventorsJia Hua Xiao, Roger A. Stern, Jerome Jackson, Grant Michael Glaze
Life of this patent
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Abstract
An ablation apparatus places electrodes at the perimeter of a cavity. In an embodiment, the alternating electric field is used to expose the cavity to enough energy to ablate the cavity. In an embodiment, two modes are used to expose different regions of the cavity to different amounts of power so that the thermal effect is more uniform. In an embodiment, the electrodes have a relatively large surface area so as to avoid charring the cavity, but are shaped so as to fit within a body orifice.
Claims18
A hollow body ablation apparatus, comprising:
- a head having at least a plurality of electrodes, at least one insulator, the head including at least an elongated member having sides and a base, wherein the sides and base outline a perimeter of a region of a tissue to be ablated;
- a controller in electrical communication with the plurality of electrodes controlling modes of energizing the plurality of electrodes;
- and
- wherein the controller has at least a bipolar mode of operation for controlling the polarities of the plurality of electrodes to form one or more pairs of electrodes, each electrode of the one or more pairs of electrodes having opposite polarities from one another during at least part of the bipolar mode, the opposite polarities of the one or more pairs of electrodes causing electric fields to be established to cover an entirety of the region of the tissue within the perimeter, wherein the electric fields are capable of ablating the region of the tissue where no electrode is in direct contact with the tissue within the perimeter.
1 more element
A hollow body ablation apparatus, comprising:
- a head having at least six electrodes, at least one insulator, the head comprising an elongated member having sides and a base, wherein the sides and base outline a perimeter of a region of a tissue to be ablated, wherein the head including
- a first set of electrodes including at least two of the at least six electrodes, the first set of electrodes being located on the base;
- a second set of electrodes including at least two of the at least six electrodes, the second set of electrodes being located on sections of the sides that are proximal to the base;
- a third set of electrodes including at least two of the at least six electrodes, the third set of electrodes being located on sections of the sides that are distal from the base;
- a controller in electrical communication with the at least six electrodes, the controller having at least two modes of energizing the at least six electrodes, the modes causing electric fields to be established for ablating an entirety of the region of the tissue within the perimeter;
- wherein a first mode of the controller causes the controller to energize the first set of electrodes and the second set of electrodes, during at least a portion of the first mode, the at least two electrodes of the first set of electrodes having opposite electric charges from one another, and during at least a portion of the first mode, the at least two electrodes of the second set of electrodes having opposite electric charges from one another, wherein during at least a portion of the first mode, one of the first set of electrodes and one of the second set of electrodes that are close to each other have opposite electric charges from one another;
- and
- wherein a second mode of the controller causes the controller to energize the third set of electrodes, during at least a portion of the second mode, the at least two electrodes of the third set of electrodes having opposite electric charges from one another.
5 more elements
A hollow body ablation apparatus, comprising:
- a head having a plurality of electrodes, at least one insulator, the head including at least an elongated member having sides and a base, wherein the sides and base outline a perimeter of a region of a tissue to be ablated;
- a controller in electrical communication with the plurality of electrodes controlling modes of energizing each electrode;
- wherein the controller includes at least bipolar modes of operation for controlling the polarities of each electrode to form various combinations of bipolar coupling pairs, the bipolar coupling pairs having opposite electric charges during at least part of the bipolar modes;
- and
- wherein the controller controls the formation of the bipolar coupling pairs to establish electric fields to cover an entirety of the region of tissue within the perimeter, wherein the electric fields causes the entirety of the region to be uniformly ablated where no electrode is in direct contact with the tissue within the perimeter.
2 more elements
Dependencies are inferred from the claim text.